Scholarlink

<p>In space, materials used in spacecraft and satellites are exposed to extreme thermal fluctuations, radiation, and humidity, which can significantly affect the component’s structural integrity. In this work, high cycle fatigue (HCF) behavior of selective laser melting (SLM) AlSi10Mg alloy under simulated space environmental conditions is studied to ensure the structural integrity of components. To evaluate the mechanical performance of SLM AlSi10Mg alloy, fatigue and tensile tests were conducted on specimens subjected to thermoshock + thermovac and humidity + radiation conditions, alongside bare samples. Among the tested conditions, the humidity + radiation specimens exhibited the highest fatigue resistance, while the bare samples showed the lowest. This increased resistance to fatigue limit of humidity + radiation specimen among all conditions is primarily attributed to a decrease in grain size and higher geometrically necessary dislocation (GND) density during controlled environmental treatments. A strong correlation was observed between the grain size and fatigue limit: The fatigue limit increased from 59&#xa0;MPa for bare (grain size, 32.66 ± 13.65&#xa0;µm) to 76&#xa0;MPa for humidity + radiation (grain size, 19.65 ± 11.43&#xa0;µm) specimens. The results confirm the suitability of SLM AlSi10Mg alloy under space-relevant conditions, supporting its viability for structural use in space components.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fatigue Behavior of Additively Manufactured AlSi10Mg Alloy Under Extreme Environment for Space Applications

  • 期刊论文

  • 发表日期：

    2025年11月21日

查看全文
  • Kartik Nair,
  • Vishvesh Badheka,
  • Kishan Fuse,
  • S. Sundar Manoharan,
  • Ravi Kumar Varma,
  • Bimal Das

摘要

In space, materials used in spacecraft and satellites are exposed to extreme thermal fluctuations, radiation, and humidity, which can significantly affect the component’s structural integrity. In this work, high cycle fatigue (HCF) behavior of selective laser melting (SLM) AlSi10Mg alloy under simulated space environmental conditions is studied to ensure the structural integrity of components. To evaluate the mechanical performance of SLM AlSi10Mg alloy, fatigue and tensile tests were conducted on specimens subjected to thermoshock + thermovac and humidity + radiation conditions, alongside bare samples. Among the tested conditions, the humidity + radiation specimens exhibited the highest fatigue resistance, while the bare samples showed the lowest. This increased resistance to fatigue limit of humidity + radiation specimen among all conditions is primarily attributed to a decrease in grain size and higher geometrically necessary dislocation (GND) density during controlled environmental treatments. A strong correlation was observed between the grain size and fatigue limit: The fatigue limit increased from 59 MPa for bare (grain size, 32.66 ± 13.65 µm) to 76 MPa for humidity + radiation (grain size, 19.65 ± 11.43 µm) specimens. The results confirm the suitability of SLM AlSi10Mg alloy under space-relevant conditions, supporting its viability for structural use in space components.